I purchased these with the sole intent of getting an awesome kegel workout to help make orgasms longer, stronger, and more attainable. I have never, ever tried kegel exercisers before so I decided on this customizable set by a trusted brand. When the box came in the mail I washed everything up and started experimenting. The beads do not have any smell or taste to them, and are very smooth. If you give them a shake they're very rumbly, but the sound is muffled once they're inserted. The beads themselves are made from a non-porous plastic and the seam appears to be welded, so cleaning is a breeze. The silicone harness is very flexible with minimal drag (but if you need lube, be sure to only use water based as silicone lube on silicone toys destroys their texture forever!). The only thing I don't love about the materials is the nylon cord. I'm not sure why they couldn't just use a single thread cord similar to fishing line, but instead they went with a woven nylon leash. This can stain and needs a little TLC in cleaning.

Knowing that I was brand spankin' new to kegel balls, I started with one pink. I had no difficulty with it- jogging, standing, doing jumping jacks. So I upgraded to one blue. Still no trouble doing the same activities. So I put two pink in the silicone harness, only to realize I still don't feel challenged. I skipped right ahead and put the two blue beads in the harness, and still do not feel challenged by this set of kegel balls. I tried moving them deeper, more shallow. I jumped, I ran, I did yoga. I'll try wearing them to CrossFit and see if they finally challenge me, but overall I am extremely disappointed with this set. I have yet to figure out why I am not feeling challenged by these beads. Perhaps the size is still too big for me and they create a vacuum effect and just don't fall out. I'm not what one would call petite- 5'5" with a small to medium frame, if that's helpful at all. Maybe they're not heavy enough for me. Maybe my Kegels are already diesel. I am not sure. Bottom line is these are ineffective kegel exercisers for me.

Although they're ineffective as kegel exercisers for me, I do love the rumble factor of these beads as they can be a great "warm-up" before getting lucky, so to speak. The rumblings of the beads works it's magic inside you and helps you to get (very) wet before having sex or even solo play. If you choose to wear these through your work day, prepare for numerous bathroom visits for clean-up. Throw some sexting into your day and you'll hit the ground running when you get home to your significant other- electronic or otherwise.

I jumped around, ran up and down stairs, jogged, practiced yoga, did household chores, and I found these beads to be entirely ineffective. If I had to activate my kegel muscles, I didn't notice nor did I feel it. I do like the rumble, and you do hear it but it's so muffled that no one in a room with you would ever notice if you didn't tell them to listen for it.
When I mention them as a "warm-up", what I mean is that their rumble factor does whatever it does and helps you get very, very wet. They're great for foreplay whether you wear them all day (may need frequent clean-ups) or just before you're getting down to business.
Removal seems to be the best part of these since they put pressure on your g-spot on the way down.
As a foreplay toy, these are excellent. As a Kegel exercise? Lelo missed the mark.